Casper to Kemmerer is 316.3 miles and takes about 5h 44m via Dwight D. Eisenhower Highway, with a fuel budget near $56 and enough daylight to finish in a day. This trip stays within Wyoming, moving from the Mountain West region to another part of the Mountain West. The route offers a mix of highway cruising and surface roads, making it a straightforward, single-day drive. Consider this option if you're looking for a direct path across the state with minimal fuss.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
158.1 miles from Casper, WY
A natural place for your longest stop of the day
, about 3h 1m into the drive
.
Main Roads
Road
Distance
Duration
Dwight D. Eisenhower Highway
144.5 mi
2h 20m
County Road 308
63.7 mi
1h 12m
US 30
45.3 mi
50m
US 287
44.1 mi
50m
Casper West Belt
7.3 mi
8m
US 20
5.1 mi
6m
West Spruce Street
1.5 mi
2m
Bryan Stock Trail
1.1 mi
1m
Longest stretch:
Dwight D. Eisenhower Highway
— 144.5 mi, about 2h 20m
Traffic on I-80
Hour-of-day weekday pattern from 20 FHWA count stations on your route.
Peak
3 PM
~588 veh/hr typical
· worst 804
Quietest
2 AM
~87 veh/hr
Peak-to-quiet ratio
6.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper, WY and Kemmerer, WY.
1
Start on North Sunlight Drive
0.3 mi·1 min·North Sunlight Drive
2
Turn right
0.1 mi·33 sec
3
Turn right onto East Sunlight Drive
0.5 mi·1 min·East Sunlight Drive
4
At end of road, turn right onto Bryan Stock Trail
1.1 mi·1 min·Bryan Stock Trail
5
Turn right onto US 20; US 26; US 87
0.2 mi·16 sec·East F Street
6
Take the ramp onto US 20; US 26; US 87
2.1 mi·2 min·US 20; US 26; US 87
7
Take the exit
0.3 mi·45 sec
Toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
8
Keep slight left at fork
350 ft·10 sec
9
Turn left onto US 20; US 26
3.0 mi·3 min·US 20; US 26
10
Continue on WY 257
7.3 mi·8 min·Casper West Belt
11
Turn right onto WY 220
64 mi·1 hr 12 min·County Road 308
12
Continue on US 287; WY 789
44 mi·50 min·US 287; WY 789
13
Turn right onto I 80 Bus; US 30 Bus; WY 789
1.5 mi·2 min·West Spruce Street
14
Take the ramp onto WY 789
0.6 mi·1 min·WY 789
15
Merge onto I 80; US 30; WY 789
145 mi·2 hr 20 min·Dwight D. Eisenhower Highway
16
Take the exit onto US 30
44 mi·48 min·US 30
Toward US 30 West: Kemmerer, Pocatello
17
Take the exit onto US 30
0.3 mi·35 sec·US 30
Exit 57Toward US 30, US 189: Kemmerer, Diamondville
18
Keep slight right at fork onto US 30
0.8 mi·1 min·US 30
Exit 57Toward US 30, US 189: Kemmerer, Diamondville
19
Continue on US 30; US 189
1.0 mi·2 min·Highway 30/189
20
Continue on US 30; US 189
0.2 mi·15 sec·Central Avenue
21
Continue on US 30; US 189
0.2 mi·34 sec·Coral Street
22
Continue on US 30; US 189
368 ft·15 sec·Pine Street
23
Turn left onto Opal Street
178 ft·9 sec·Opal Street
24
Turn right
205 ft·14 sec
25
Arrive at destination
Trip Plan
Given the 5h 44m estimated drive time, departing Casper in the morning allows ample time to reach Kemmerer before sunset. With only one recommended stop, you can manage your breaks efficiently. Keep an eye on your fuel gauge, especially after leaving the Dwight D. Eisenhower Highway, as services might be more spread out on the county and US routes. This is a manageable drive for one day, so you have the flexibility to stop more if desired.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 158.1 miles from Casper, WY, or about 3h 1m into the drive.
The longest continuous stretch on this route runs about 144.5 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 70 miles or 1h 24m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 158.1 miles or 3h 1m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 39m
Traffic, exits, and arrival timing usually matter more near Kemmerer, WY than in the middle of the route.
Before You Leave
+
Open the route before leaving Casper, WY so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Casper, WY
This is one driving day of about 316.3 miles and 5h 44m.
Your first comfortable stop window is around 70 miles from Casper, WY.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Dwight D. Eisenhower Highway for about 144.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 14
5 decision points cluster between mile 0.3 and 314 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.3 mi into trip|~1m in
Turn right
Navigation decision point
5
0.9 mi into trip|~3m in|Bryan Stock Trail
At end of road, turn right onto Bryan Stock Trail
Navigation decision point
5
4.3 mi into trip|~8m in
Take the exit toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 20 West, US 26 West, WY 220 West: Sho...
6
313.6 mi into trip|~5h 38m in|US 30
Take the exit onto US 30 toward US 30, US 189: Kemmerer, Diamondville
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 57
Toward US 30, US 189: Kemmerer, Diamondville
7
314 mi into trip|~5h 38m in|US 30
Keep slight right at fork onto US 30 toward US 30, US 189: Kemmerer, Diamondville
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Exit 57
Toward US 30, US 189: Kemmerer, Diamondville
Fuel & Cost
Regular Gas
$49.30 one way
$98.60 round trip
$3.96/gal25.4 MPG avg111 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$51.97
$103.93
premium
$4.47
$55.71
$111.43
diesel
$4.80
$59.72
$119.45
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$49
Meals
$25–$50
Total
$74–$99
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 110.7 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $33 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
94.9
1
$33.21
$15.18
Efficient EV
79.1
0
$27.68
$12.65
EV Truck/SUV
126.5
1
$44.28
$20.24
Gas CO2
111 kg
EV CO2
37 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Jul 17, 2026
Origin
Casper, WY
Evening
in Casper on Saturday
Local time
7:26 PM
MDT
Current temp
96°F
Sunny
E 3 to 17 mph1% chanceLive forecast
Flood Watch
Flood Watch issued July 17 at 10:33AM MDT until July 17 at 10:00PM MDT by NWS Riverton WY
Flood Watch
Flood Watch issued July 17 at 10:33AM MDT until July 17 at 10:00PM MDT by NWS Riverton WY
Destination
Kemmerer, WY
Evening
in Kemmerer on Saturday
Local time
7:26 PM
MDT
Current temp
86°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
SE 5 to 9 mph24% chanceLive forecast
Flood Watch
Flood Watch issued July 17 at 10:33AM MDT until July 17 at 10:00PM MDT by NWS Riverton WY
Flood Watch
Flood Watch issued July 17 at 10:33AM MDT until July 17 at 10:00PM MDT by NWS Riverton WY
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
10 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 44m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Fossil Butte National Monument
National Monument
In the ridges of southwest Wyoming are some of the best-preserved fossils in the world. They tell the story of ancient life in a warm, wet environment in and around a freshwater lake. Stingrays swam i...
12 mi from route
~31 min detour
Free
near mile 316.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend about 30% of your drive on the Dwight D. Eisenhower Highway, covering a continuous stretch of 144.5 miles. After leaving the highway, you'll transition to County Road 308 and then US 30, which will feel more like rural cruising. Expect the exits to become less frequent as you move away from the main interstate.
30% highway, the rest on surface roads — varied driving throughout.
25 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 144.5 mi on Dwight D. Eisenhower Highway.
How Hard Is This Drive?
5/10
This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 14 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.3 miles in.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 316.3 miles you will encounter 14 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.3 miles: Navigation decision point; at 0.9 miles (Bryan Stock Trail): Navigation decision point; at 4.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
High-altitude sections with notable climbs
7,196 ft5,201 ft
Total Climb
3,224 ft
Total Descent
1,473 ft
Highest Point
7,196 ft
~113 mi in
Elevation Range
1,996 ft
Notable High Points
6,257 ft at ~45.2 miles+205 ft prominence
7,196 ft at ~113 miles+504 ft prominence
6,909 ft at ~180.7 miles+124 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Casper, WY to Kemmerer, WY, road signs begin pointing toward Pocatello along the way.
Casper is a city in Central Wyoming with a population of 59,000 people (2020). If you're passing through the state, Casper is a likely choice for an overnight stop or as a place to find food and supplies before heading to the national parks in the state's northwestern corner or to the forests located to the southeast or to the north.
The city has a few attractions to entertain visitors for a day or so, but the real attraction lies in the surrounding areas, which include some of the state's most interesting historical and natural sites. Independence Rock, South Pass City, Ayre's Bridge, Castle Gardens and two national forests are within a 60-mile (100-km) drive of downtown Casper. The Oregon and California trails once passed through the city and visible signs of their presence can be found within a stone's throw of the city's boundaries.
Top landmarks
•North Casper Clubhouse
•Rialto Theatre — movie theater in Casper, Wyoming, United States
•Casper Fire Department Station No. 1 — fire station in Casper, Wyoming
Doable as a same-day drive at 5h 44m. Total distance: 316.3 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 44m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (30%). Some complex stretches to watch for.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 144.5 miles on Dwight D. Eisenhower Highway. The full list of main roads is in the Roads section above.
Yes — we found about 9 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 9 rest areas along the route for bathroom stops.
Mostly yes along the main roads, but rural stretches through WY can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.3 miles: Navigation decision point; at 0.9 miles (Bryan Stock Trail): Navigation decision point; at 4.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Yes — Fossil Butte National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.7 hours each way, a round trip means 11.5 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Kemmerer, WY before the return drive.
